How To Auto Repair Windows 7

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If some Windows functions aren't working or Windows crashes, apply the System File Checker to scan Windows and restore your files.

Though the steps below might look complicated at first glance, just follow them in order, stride-by-step, and we'll try to get you back on track.

Run the System File Checker tool (SFC.exe)

To practice this, follow these steps:

1. Open an elevated command prompt. To do this, do the following every bit your advisable:

2. If you are running Windows 10, Windows 8.1 or Windows 8, start run the inbox Deployment Image Servicing and Direction (DISM) tool prior to running the System File Checker.  (If y'all are running Windows 7 or Windows Vista, skip to Stride 3.)

Type the following command, and then press Enter.  It may take several minutes for the command functioning to be completed.

DISM.exe /Online /Cleanup-image /Restorehealth

Of import: When you run this command, DISM uses Windows Update to provide the files that are required to fix corruptions. However, if your Windows Update customer is already broken, use a running Windows installation as the repair source, or apply a Windows side-past-side folder from a network share or from a removable media, such as the Windows DVD, as the source of the files. To do this, run the following command instead:

DISM.exe /Online /Cleanup-Image /RestoreHealth /Source:C:\RepairSource\Windows /LimitAccess

Note: Supersede the C:\RepairSource\Windows placeholder with the location of your repair source. For more than information about using the DISM tool to repair Windows, reference Repair a Windows Image.

1. At the command prompt, type the following command, and so press ENTER:

sfc /scannow

The sfc /scannow command will scan all protected system files, and replace corrupted files with a cached copy that is located in a compressed binder at %WinDir%\System32\dllcache.
The %WinDir% placeholder represents the Windows operating organisation binder. For example, C:\Windows.

Note Practise non close this Command Prompt window until the verification is 100% complete. The scan results volition be shown after this process is finished.

1. Afterwards the process is finished, you may receive one of the post-obit letters:

   • Windows Resource Protection did not find any integrity violations.

     
     This means that you lot do non have whatsoever missing or corrupted arrangement files.

   • Windows Resource Protection could not perform the requested performance.

     
     To resolve this problem, perform the System File Checker scan in safe style, and make certain that the PendingDeletes and PendingRenames folders exist under %WinDir%\WinSxS\Temp.

   • Windows Resources Protection constitute decadent files and successfully repaired them. Details are included in the CBS.Log %WinDir%\Logs\CBS\CBS.log.

     
     To view the detail information most the system file browse and restoration, get to How to view details of the System File Checker procedure.

   • Windows Resource Protection institute corrupt files but was unable to fix some of them. Details are included in the CBS.Log %WinDir%\Logs\CBS\CBS.log.

     
     To repair the corrupted files manually, view details of the Organization File Checker procedure to find the corrupted file, and then manually replace the corrupted file with a known good copy of the file.

Swipe in from the correct edge of the screen, then tap Search. Or, if you are using a mouse, indicate to the lower-right corner of the screen, so click Search. Type Command Prompt in the Search box, right-click Command Prompt, and then click Run as administrator. If you are prompted for an administrator countersign or for a confirmation, type the password, or click Let.

To do this, click Showtime, type Control Prompt or cmd in the Search box, right-click Command Prompt, and then click Run as administrator. If yous are prompted for an ambassador password or for a confirmation, type the password, or click Permit.

More Information

How to view details of the System File Checker process

To view the details that included in the CBS.Log file, you can re-create the information to the Sfcdetails.txt file by using the Findstr command, and then view the details in the Sfcdetails.txt. To practise this, follow these steps:

1. Open an elevated command prompt equally described in the previous step 1.

2. At the command prompt, blazon the following command, and so press ENTER:

   findstr /c:"[SR]" %windir%\Logs\CBS\CBS.log >"%userprofile%\Desktop\sfcdetails.txt"                    

   Annotation The Sfcdetails.txt file contains details from every time that the System File Checker tool has been run on the computer. The file includes data near files that were not repaired by the System File Checker tool. Verify the date and time entries to determine the problem files that were constitute the last time that you ran the System File Checker tool.

3. Open the Sfcdetails.txt file from your desktop.

4. The Sfcdetails.txt file uses the following format:

   Appointment/Time SFC detail The following sample log file contains an entry for a file that could not be repaired: 2007-01-12 12:10:42, Info CSI 00000008 [SR] Cannot repair member file [l:34{17}]"Accessibility.dll" of Accessibility, Version = 6.0.6000.16386, pA = PROCESSOR_ARCHITECTURE_MSIL (8), Culture neutral, VersionScope neutral, PublicKeyToken = {l:viii b:b03f5f7f11d50a3a}, Blazon neutral, TypeName neutral, PublicKey neutral in the store, file is missing

How to manually supercede a corrupted system file with a known skilful copy of the file

Later you make up one's mind which system file was corrupted and could not be repaired through the detail information in the Sfcdetails.txt file, find where the corrupted file located, and and then manually replace the corrupted file with a known good copy of the file. To do this, follow these steps:

Note Yous may be able to go a known good copy of the organization file from some other computer that is running the same version of Windows with your computer. You may perform a Arrangement File Checker process on that figurer to brand sure the arrangement file that you lot intend to copy is a skilful re-create.

1. Accept administrative ownership of the corrupted system file. To practise this, at an elevated command prompt, re-create and then paste (or type) the following command, and and then press ENTER:

   takeown /f Path_And_File_Name Note The Path_And_File_Name placeholder represents the path and the file name of the corrupted file. For example, type takeown /f C:\windows\system32\jscript.dll.
   

2. Grant administrators full access to the corrupted system file. To do this, copy and paste (or blazon) the post-obit control, and so press ENTER:

   icacls Path_And_File_Name /GRANT ADMINISTRATORS:F Note The Path_And_File_Name placeholder represents the path and the file name of the corrupted file. For example, type icacls C:\windows\system32\jscript.dll /grant administrators:F.
   

3. Replace the corrupted system file with a known practiced copy of the file. To practice this, copy and paste (or blazon) the following command, and then printing ENTER:

   Copy Source_File Destination Note The Source_File placeholder represents the path and file proper name of the known proficient copy of the file on your calculator, and the Destination placeholder represents the path and file name of the corrupted file. For example, type re-create Due east:\temp\jscript.dll C:\windows\system32\jscript.dll.

If the steps above don't work, y'all may need to reinstall Windows. For more than info, see Windows 10 recovery options.

Need more assistance?

Source: https://support.microsoft.com/en-us/topic/use-the-system-file-checker-tool-to-repair-missing-or-corrupted-system-files-79aa86cb-ca52-166a-92a3-966e85d4094e

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